Long day - long drive

Kauai has just one road that extends about three-quarters around the island. We are staying at Princeville which is at 90% of the North end. We drove to about 5% of the Southwest end and then turned right and headed up the Waimea Canyon. Since we are renting a 4X4 Jeep, we had to put a little mud on our mud so some dirt road driving was on the books. We found a trail that lead to an amazing blogging location:

The road has my interest piqued as it was a major construction project that leads to a couple trailheads and a nice picnic area. Since the picnic area is at the top head of the canyon, I am guessing that it might be left over from WW2 -- maybe a communications relay station as the top of the canyon has a commanding view of the Western side of the island. The top of the canyon currently hosts several military facilities with large antennae and sensors...